drivers/staging/winbond/mto.c

   1 /*
   2  * ============================================================================
   3  * MTO.C -
   4  *
   5  * Description:
   6  * MAC Throughput Optimization for W89C33 802.11g WLAN STA.
   7  *
   8  * The following MIB attributes or internal variables will be affected
   9  * while the MTO is being executed:
  10  *      dot11FragmentationThreshold,
  11  *      dot11RTSThreshold,
  12  *      transmission rate and PLCP preamble type,
  13  *      CCA mode,
  14  *      antenna diversity.
  15  *
  16  * Copyright (c) 2003 Winbond Electronics Corp. All rights reserved.
  17  * ============================================================================
  18  */
  19
  20 #include "sysdef.h"
  21 #include "sme_api.h"
  22 #include "wbhal_f.h"
  23
  24 /* Declare SQ3 to rate and fragmentation threshold table */
  25 /* Declare fragmentation thresholds table */
  26 #define MTO_MAX_FRAG_TH_LEVELS          5
  27 #define MTO_MAX_DATA_RATE_LEVELS        12
  28
  29 u16 MTO_Frag_Th_Tbl[MTO_MAX_FRAG_TH_LEVELS] = {
  30         256, 384, 512, 768, 1536
  31 };
  32
  33 /*
  34  * Declare data rate table:
  35  * The following table will be changed at anytime if the opration rate
  36  * supported by AP don't match the table
  37  */
  38 static u8 MTO_Data_Rate_Tbl[MTO_MAX_DATA_RATE_LEVELS] = {
  39         2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108
  40 };
  41
  42 static int TotalTxPkt;
  43 static int TotalTxPktRetry;
  44 /* this record the retry rate at different data rate */
  45 static int retryrate_rec[MTO_MAX_DATA_RATE_LEVELS];
  46
  47 static int PeriodTotalTxPkt;
  48 static int PeriodTotalTxPktRetry;
  49
  50 static u8 boSparseTxTraffic;
  51
  52 void MTO_Init(struct wbsoft_priv *adapter);
  53 void TxRateReductionCtrl(struct wbsoft_priv *adapter);
  54 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 t0, u8 index);
  55 void MTO_TxFailed(struct wbsoft_priv *adapter);
  56 void hal_get_dto_para(struct wbsoft_priv *adapter, char *buffer);
  57
  58 /*
  59  * ===========================================================================
  60  * MTO_Init --
  61  *
  62  *  Description:
  63  *    Initialize MTO parameters.
  64  *
  65  *    This function should be invoked during system initialization.
  66  *
  67  *  Arguments:
  68  *    adapter      - The pointer to the Miniport adapter Context
  69  * ===========================================================================
  70  */
  71 void MTO_Init(struct wbsoft_priv *adapter)
  72 {
  73         int i;
  74
  75         MTO_PREAMBLE_TYPE() = MTO_PREAMBLE_SHORT;   /* for test */
  76
  77         MTO_CNT_ANT(0)                  = 0;
  78         MTO_CNT_ANT(1)                  = 0;
  79         MTO_SQ_ANT(0)                   = 0;
  80         MTO_SQ_ANT(1)                   = 0;
  81
  82         MTO_AGING_TIMEOUT()             = 0;
  83
  84         /* The following parameters should be initialized to the values set by user */
  85         MTO_RATE_LEVEL()                = 0;
  86         MTO_FRAG_TH_LEVEL()             = 4;
  87         MTO_RTS_THRESHOLD()             = MTO_FRAG_TH() + 1;
  88         MTO_RTS_THRESHOLD_SETUP()       = MTO_FRAG_TH() + 1;
  89         MTO_RATE_CHANGE_ENABLE()        = 1;
  90         MTO_FRAG_CHANGE_ENABLE()        = 0;
  91         MTO_POWER_CHANGE_ENABLE()       = 1;
  92         MTO_PREAMBLE_CHANGE_ENABLE()    = 1;
  93         MTO_RTS_CHANGE_ENABLE()         = 0;
  94
  95         for (i = 0; i < MTO_MAX_DATA_RATE_LEVELS; i++)
  96                 retryrate_rec[i] = 5;
  97
  98         MTO_TXFLOWCOUNT() = 0;
  99         /* --------- DTO threshold parameters ------------- */
 100         MTOPARA_PERIODIC_CHECK_CYCLE()          = 10;
 101         MTOPARA_RSSI_TH_FOR_ANTDIV()            = 10;
 102         MTOPARA_TXCOUNT_TH_FOR_CALC_RATE()      = 50;
 103         MTOPARA_TXRATE_INC_TH()                 = 10;
 104         MTOPARA_TXRATE_DEC_TH()                 = 30;
 105         MTOPARA_TXRATE_EQ_TH()                  = 40;
 106         MTOPARA_TXRATE_BACKOFF()                = 12;
 107         MTOPARA_TXRETRYRATE_REDUCE()            = 6;
 108         if (MTO_TXPOWER_FROM_EEPROM == 0xff) {
 109                 switch (MTO_HAL()->phy_type) {
 110                 case RF_AIROHA_2230:
 111                 case RF_AIROHA_2230S:
 112                         MTOPARA_TXPOWER_INDEX() = 46; /* MAX-8 @@ Only for AL 2230 */
 113                         break;
 114                 case RF_AIROHA_7230:
 115                         MTOPARA_TXPOWER_INDEX() = 49;
 116                         break;
 117                 case RF_WB_242:
 118                         MTOPARA_TXPOWER_INDEX() = 10;
 119                         break;
 120                 case RF_WB_242_1:
 121                         MTOPARA_TXPOWER_INDEX() = 24;
 122                         break;
 123                 }
 124         } else { /* follow the setting from EEPROM */
 125                 MTOPARA_TXPOWER_INDEX() = MTO_TXPOWER_FROM_EEPROM;
 126         }
 127         RFSynthesizer_SetPowerIndex(MTO_HAL(), (u8) MTOPARA_TXPOWER_INDEX());
 128         /* ------------------------------------------------ */
 129
 130         /* For RSSI turning -- Cancel load from EEPROM */
 131         MTO_DATA().RSSI_high = -41;
 132         MTO_DATA().RSSI_low = -60;
 133 }
 134
 135 /* ===========================================================================
 136  * Description:
 137  *      If we enable DTO, we will ignore the tx count with different tx rate
 138  *      from DTO rate. This is because when we adjust DTO tx rate, there could
 139  *      be some packets in the tx queue with previous tx rate
 140  */
 141
 142 void MTO_SetTxCount(struct wbsoft_priv *adapter, u8 tx_rate, u8 index)
 143 {
 144         MTO_TXFLOWCOUNT()++;
 145         if ((MTO_ENABLE == 1) && (MTO_RATE_CHANGE_ENABLE() == 1)) {
 146                 if (tx_rate == MTO_DATA_RATE()) {
 147                         if (index == 0) {
 148                                 if (boSparseTxTraffic)
 149                                         MTO_HAL()->dto_tx_frag_count += MTOPARA_PERIODIC_CHECK_CYCLE();
 150                                 else
 151                                         MTO_HAL()->dto_tx_frag_count += 1;
 152                         } else {
 153                                 if (index < 8) {
 154                                         MTO_HAL()->dto_tx_retry_count += index;
 155                                         MTO_HAL()->dto_tx_frag_count += (index + 1);
 156                                 } else {
 157                                         MTO_HAL()->dto_tx_retry_count += 7;
 158                                         MTO_HAL()->dto_tx_frag_count += 7;
 159                                 }
 160                         }
 161                 } else if (MTO_DATA_RATE() > 48 && tx_rate == 48) {
 162                         /* for reducing data rate scheme, do not calculate different data rate. 3 is the reducing data rate at retry. */
 163                         if (index < 3) {
 164                                 MTO_HAL()->dto_tx_retry_count += index;
 165                                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 166                         } else {
 167                                 MTO_HAL()->dto_tx_retry_count += 3;
 168                                 MTO_HAL()->dto_tx_frag_count += 3;
 169                         }
 170
 171                 }
 172         } else {
 173                 MTO_HAL()->dto_tx_retry_count += index;
 174                 MTO_HAL()->dto_tx_frag_count += (index + 1);
 175         }
 176         TotalTxPkt++;
 177         TotalTxPktRetry += (index + 1);
 178
 179         PeriodTotalTxPkt++;
 180         PeriodTotalTxPktRetry += (index + 1);
 181 }